abstract class LgzT {
    private name:string = "lgz";
    abstract run():void;
    abstract sleep(hours:number):number;
}
class lgzTR extends LgzT{
    sleep(hours: number): number {
        return hours;
    }

    run(): void {
    }

    cachi(){
        console.log("你好")
    }
}
new lgzTR().cachi();